Rotary pump



Jan. 10, 1928. 1,655,749

A. W. BURKS ROTARY PUMP Filed Jan.l0. 1925- 2 Sheets-Sheet 1 Z5 J3 J2 l;- g

euro: 11 011:

Jan. 10, 1928. 1, 55,749

A. W. BURKS ROTARY PUMP Filed Jan.10, l925 2 Sheets-Shut 2 Patented Lian. 10, 1928.

I 1,655,749 PATENT OFFICE.

UNITED STATES ARTHUR W. BURKS, OF DECATUR, ILLINOIS.

ROTARY PUMP.

Application filed January the rotor a casing having a raceway so related to the rotor that it affords a substantially closed passage or channel for the fluid as it passes through the pump.

The invention also has as its object the provision of a multiple stage pump embodying a plurality of fluid raceways intercommunicating and ada ted successively to receive the fluid, there eing in associatlonwith each raceway a series of buckets serving to increase the velocity and pressure head of the fluid as the same passes through the several raceways success vely.

In the accompanying drawings there are shown certain devices embodying the invention, and .in these drawings Fig. 1 is a top plan view,

Fig. 2 is a cross section on the line 22 of Fig. 3,

Fig. 3 is a section on the line 3-3 of Fig.

i 2 looking in the direction of the arrows,

stantially equal diameter.

Fig. 4 is a view similar to Fig. 3 showing a single stage pump, and

Fig. 5 is a section on the line ,55 of Fig.

Referring to the drawings more in detail, and considering first the form of the device shown in Figs. 1, 2 and 3, 10 indicates a casin having a circumferential wall 10 provi ed on its inner face with a plurality of grooves or raceways 11, 12 and 13 arranged in substantially parallel planes and of sub- The grooves are suitably spaced apart by dividing walls and the groove 11 has an inlet opening 14 through which the fluid enters the casing, this groove serving as the first stage raceway. The en'- cumferential wall of the casing is thickened at the upper portion thereof and a passageway 15 serves .to permit the fluid to pass through an outlet opening 14' from the raceway 11 to the raceway 12, which it enters through an inlet 12. The latter mentioned raceway communicates through an outlet 12" with a passage 16. connecting the same 10, 1925. Serial m. 1,678.

with the inlet opening 13 of the raceway 13, the latter having a pump outlet opening 17 (Fig. 1).

By reference to Fig. 1 it will be obseryed that the raceway 12 has its inlet opening 12', and the raceway 13 its inlet opening 13 in alignment with the pump inlet 14, and the outlet 12" of the raceway 12 as well as the outlet 14 of the first stage raceway 11 are aligned with the pump outlet 17. The arrangement of the inlet and outlet openings of the raceways in the same relative positions with respect to the rotor insures that in each raceway the fluid will be treated in substantially the same manner and without impeding the progress ofthe fluid through the pump. The raceways do not extend completely around the wall of the casing, but

are closed between the inlet and outlet openings at the top of the casing, as will be noted in Fig. 3, in order to prevent leakage of the water or other fluid past the outlet openings.

A shaft 18 extends through the casing, having a bearing 19 in a boss 20, and a bearing 21 in a face plate 22 secured to the casing as by'bolts 23. A gland 24 serves to close a stuffing box 26 in which is located suitable packing to seal the casing against leakage.

Upon the shaft 18 is fixedly mounted a rotor, in the present instance formed of a plurality of sections 26, 27 and 28 which 00- operate, respectively, with the raceways 11, 12 and 13. Each rotor section has a peripheral groove or channel 29 and its eriphery on opposite sides of the channel ma es a close and substantially water-tight joint with the wall of the caslng. Thus, each peripheral rotor groove and the surrounding raceway of the casing form, together, a substantially closed passage for the fluid in which the fluid is operated upon by impelling means on the rotor. In each rotor groove 29 there is positioned a series of blades 30 extending transversely of the groove and inclined in the direction of rotation of the rotor, as indicated by the arrow in Fig. 3. The inclination of the buckets materially minimizes the force of the impact of the fluid entering each raceway through its inlet opening, and the ends' of the blades are substantially flush with the periphery of the rotor, thus affording a clear and unobstructed raceway. While the rotor is shown in the drawings as beingformed of separate members, it will be understood that the use of an integral structure is within the scope of the invention, it merely belng necessary for the accomplishment of the ob ects of the invention that the series of buckets and raceways be separated substantially in the manner indicated.

In the operation of the pump, fluid enters the raceway 11 through the inlet opening 1+1: and is engaged by the buckets of the impeller 11 which carry the fluid around the raceway to the out-let 14. During its course through the raceway the fluid is repeatedly engaged by the buckets and its velocity head is materially increased by the action of the centrifugal force which tends to throw the water against the outer wall of the raceway, the centrifugal force being modified by forward or tangential force created by the revolution of the rotor. The path actually taken by the fluid is a component of these two forces. Each amount of fluid operated upon 1n this manner obtains a great increase in velocity head, which is immediately iniparted in the form of ressure head to the advance or preceding uid in the raceway. After the fluid has been thus actuated in the first stage raceway 11 it travels through the outlet opening 14' thereof and the passageway 15 to the second stage raceway 12, entering the latter through the inlet 12 where it is at once engaged by the buckets of the rotor 27.

passes through the outlet 12" and passageway 16 to the final raceway 13, wherein it is operated upon by the rotor 28 and forced through the pump outlet opening 15.

Referring to the structure shown in Figs.

4 and 5, my improved rotor is shown as em-' positioned upon a shaft 41 which has bearings 42 and 4:3, thelatter bearing being in a cover plate 44: secured to the casing as by bolts 45. The rotor is formed with a peripheral channel 46 and fits closely against the wall 35 of the casing on each side of the channel, in which are positioned blades 47 forming a series of peripheral buckets; the blades are substantially flush with the periphery of the rotor on each side of the channel 46 and are suitably aligned with the raceway. The pump operates in substantially the same manner as the form shown in Figs. 1, 2 and 3, but the fluid, after passing through the single raceway,

After following the course of the second stage raceway 12 the fluid immediately makes its exit through the out.- let opening without passing through further stages of pump actuation.

It will be observed that in both the multiple and single stage pumps, the raceways are curved, and more specifically, of substantially semi-circular formation in crosssection. Moreover, the walls of the raceway and buckets merge or are substantially continuous at the lines of juncture, and the cross-sectional shape of each bucket is such that in association with the adjacent crosssection of the raceway, the entire wall of the bucket and raceway is of curved or circular form, as will be noted particularly in Figures 2 and 5. This construction avoids any sharp corners or bends for the water, and when the same is thrown upwardly by a centrifugal action, a whirling effect is imparted thereto by the raceway, and it returns to the buckets at a point further on in the raceway without such loss by friction as would occur if the buckets were not associated as above described.

It should be understood that numerous modifications may be made in the structure illustrated and described without departing from the sco e of the invention, which is more definite y defined in the following claims.

I claim:

1. A pump comprising a rotor having on its periphery an annular channel or groove, a plurality of blades each extending transversely of said groove to .form a series of buckets, the ends of said blades bein substantially flush with the periphery of t e rotor on each side of said groove, and a casing having an annular channel therein surrounding said series of buckets, said casing on each side of the channel making a substantially water-tight joint with the periphery of the rotor to form a closed fluid raceway and having inlet and outlet openings and means interposed therebetween to closely fit the exposed edges of the blades and periphery of the impeller to deflect liquid from the raceway to the outlet.

2. A pump comprising a rotor having on its periphery an annular channel or groove, a plurality of blades each extending transversely of said groove to form a series of buckets, and a casing having an annular channel therein surrounding said series of buckets, said casing on each side of the channel making a water-tight joint with the periphery of the rotor to form a closed fluid raceway and having inlet and outlet openings and means interposed therebetween to closely fit the exposed edges of the blades and periphery of the impeller to deflect liquid from the raceway to the outlet.

3. A pump comprising a rotor having on its periphery an annular channel or groove, a plurality of blades each extending transversely of said groove to form a series of buckets, and being inclined in the direction of rotation of the rotor, the ends of said blades being substantially flush with the periphery of the rotor oneach side of said groove, and a casing having an annular channel therein surrounding said series of buckets, said casing on each side of the channel making a substantially water-tight joint with the periphery of the rotor to form a closed fluid raceway and having inlet and outlet openings and means interposed therebetween to closely fit the exposed ed es of the blades and periphery of the impe ler to iieflect liquid from the raceway to the out- 4. A pump comprising a rotor-having on its periphery an annular channel or groove, a plurality of blades each extending transversely of said groove to form a series of buckets, and being inclined in the direction of rotation of the rotor, and a casing having an annular channel therein surrounding said series of buckets, said casing on each side of the channel making a substantially water-tight joint with the periphery of the rotor to form a closed fluid raceway andhaving inlet and outlet openings and means interposed therebetween to closely fit the exposed edges of the blades and periphery of the impeller to deflect liquid from the raceway to the outlet.

5. In a multiple stage rotary pump, acasing having a plurality of communicating raceways arranged in substantially parallel planes, and a rotor in the casing having a plurality of series of buckets, each series being surrounded by a raceway and the casing making substantially water-tight joints with the rotor between the series to form closed fluid raceways and having inlet and outlet openings and means interposed therebetween to closely fit the exposed edges of the blades and periphery of the impeller to deflect liquid from the raceway to the outlet.

6. In a multiple stage rotary pump, a casing having a plurality of raceways arranged in substantially parallel pianes and .a passage connecting said raceways, and a rotor in said casing having a plurality of series'of buckets with each series surrounded by a raceway, the casing making substantially water-tight joints with the rotor at the sides of each series to form closed fluid raceways and having inlet and outlet openings and means interposed therebetween to closely fit the exposed edges of the blades and periphery of the impeller to deflect liquid from the raceway to the outlet.

7. In a multiple stage rotary pump, a casing having a plurality of raceways of substantially equal diameter, a passage connecting said raceways, aninlet opening communicating withione raceway, and an outlet opening communicating with another of said raceways; a rotor in said casing having a ways; a rotor in said casing having a plurality of series of peripheral buckets, each series being surrounded by a raceway and the casing making substantially water-tight joints with the rotor to form closed fluid raceways.

9. In a multiple stage rotary pump, a casing having a plurality of communicating raceways, an inlet opening communicating with one raceway, and an outlet opening communicating with another of said raceways; a rotor in said casing having a plurality of series of peripheral buckets, each series being surrounded by a raceway and the casing making substantially water-tight joints with the periphery of the rotor to form closed fluid raceways, said casing having adjacent said outlet opening means closely fitting the periphery of the rotor and the exposed edges of the blades to deflect liquid 4 raceways; a rotor in the casing haying spaced peripheral grooves, and a plurality of blades in each groove extending transversely thereof to form a series of buckets, said casing making substantially watertight joints with the periphery of the rotor at the sides of the series of buckets to form closed fluid raceways and having adjacent said outlet opening means closely fitting the exposed edges of the blades and the periphery of the rotor to de flect liquid to the outlet.

11. In a multiple stage rotary pump, a casing having a plurality of communicating raceways, an inlet opening communicating with one of said raceways and an outlet opening communicating with another of said raceways, a rotor in the casing having spaced peripheral grooves, and a plurality of blades in each groove extending transversely thereof to form a series of buckets, the ends of said blades being substantially flush with the periphery of the rotor on each side ofsaid groove, and said casing making substantially water-tight joints with the periphery of the rotor at the sides of the series of buckets to form closed fluid raceways.

12. In a multiple stage rotary pump, a casing having a plurality of communicating raceways, an inlet opening communicating with one of said raceways and an outlet opening communicating with another of said raceways; a rotor in said casing having peripheral grooves, each groove being surrounded by a raceway, and a plurality of blades in each groove extending transversely of the groove to form a series of buckets, the blades being inclined in the direction of rotation of the rotor and the casing making substantially water-tight joints with the rotor at the sides of the buckets to form closed fluid raceways.

13. In a multiple stage rotary pump, a casing having a plurality of communicating raceways, an inlet opening communicating with one of said raceways and an outlet opening communicating with another of said raceways, a rotor in said casing having peripheral grooves, each groove being surrounded by a raceway, and a plurality of blades in each groove extending transversely thereof to form a series of buckets, the blades being inclined in the direction of rotation-of the rotor, and the casing making substantially Water-tight joints With the periphery of the rotor at the sides of each series of buckets to form closed fluid raceways.

In testimony whereof I have hereunto set my hand.

ARTHUR W. BURKS. 

